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The scaffolding of a formal context

The scaffolding of a formal context

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7th International Conference on Concept Lattices and Their Applications, CLA 2010

作者： Doerfel, Stephan Knowledge and Data Engineering Group Department of Mathematics and Computer Science University of Kassel Wilhelmshöher Allee 73 34121 Kassel Germany Department of Mathematics Institute of Algebra Technical University of Dresden 01062 Dresden Germany

The scaffolding of a complete lattice L of finite length was introduced by Rudolf Wille in 1976 as a relative subsemilattice of L that can be constructed using subdirect decomposition. The lattice is uniquely defined by its scaffolding and can be reconstructed from it. Using bonds, we demonstrate how the scaffolding can be constructed from a given formal context and thereby extend the notion of the scaffolding to doubly founded lattices. Further, we explain the creation of a suitable graphical representation of the scaffolding from the context.

关键词： Scaffolds

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Managing ontology based integration systems using dependencies

Managing ontology based integration systems using dependenci...

引用

IEEE Annual Conference on Pervasive Computing and Communications Workshops (PerCom)

作者： Aidan Boran Declan O'Sullivan Vincent Wade Bell Laboratories Ireland Alcatel-Lucent Dublin Ireland Knowledge and Data Engineering Group Dublin Ireland

Ontology-based information integration systems have been proposed to solve the problem of combining data residing at autonomous and heterogeneous sources. For such ontology based solutions to succeed in an industrial context, the integration ontology and mappings need to be managed to allow them to evolve as the data sources evolve. This research has developed a technique to support the management of ontology-based integration systems by modeling the dependencies that arise in the system. This paper describes the management problem, a solution, an industrial case study using dependency modeling and an evaluation mechanism.

关键词： Ontologies Context modeling Supply chains Routing Relational databases Reverse logistics knowledge management Supply chain management engineering management data engineering

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Multi-facet exploration of image collections with an adaptive multi-focus zoomable interface

Multi-facet exploration of image collections with an adaptiv...

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International Joint Conference on Neural Networks (IJCNN)

作者： Sebastian Stober Christian Hentschel Andreas Nürnberger Data & Knowledge Engineering Group of the Faculty of Computer Science Otto-von-Guericke-University Magdeburg Germany

Sometimes it is not possible for a user to state a retrieval goal explicitly a priori. One common way to support such exploratory retrieval scenarios is to give an overview using a neighborhood-preserving projection of the collection onto two dimensions. However, neighborhood cannot always be preserved in the projection because of the dimensionality reduction. Further, there is usually more than one way to look at a collection of images - and diversity grows with the number of features that can be extracted. We describe an adaptive zoomable interface for exploration that addresses both problems: It makes use of a complex non-linear multi-focal zoom lens that exploits the distorted neighborhood relations introduced by the projection. We further introduce the concept of facet distances representing different aspects of image similarity. Given user-specific weightings of these aspects, the system can adapt to the user's way of exploring the collection by manipulation of the neighborhoods as well as the projection.

关键词： Measurement Visualization Feature extraction Image color analysis Indexing Lenses Nonlinear distortion

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Extending a knowledge-based network to support temporal event reasoning

Extending a knowledge-based network to support temporal even...

引用

IEEE Symposium on Network Operations and Management

作者： John Keeney Clay Stevens Declan O'Sullivan Knowledge & Data Engineering Group & FAME School of Computer Science & Statistics Trinity College Dublin Dublin Ireland

ISBN: (纸本)9781424453665

While the polling or request/response paradigm adopted by many network and systems management approaches form the backbone of modern monitoring and management systems, the most important and interesting events, faults, alerts and log messages arrive at the management agent in a push-based asynchronous manner. However, in the management infrastructure itself, at the point where events are initially processed and matched to subscribers, there have been few attempts to identify relationships or dependencies between events. This means that most of this burden is placed on the management application, or indeed the managers themselves. This research investigates enhancing the expressiveness of a knowledge-based networking middleware with the addition of three temporal operators to be used in subscriptions to select matching events. A prototype design is presented and a number of implementations are compared. The approach is also motivated using two scenarios for temporal correlation of warnings and faults in managed networks. The effect on the scalability of the extended knowledge-based network system is also evaluated.

关键词： Subscriptions knowledge management Middleware Scalability engineering management Filtering Computer network management Routing Matched filters data engineering

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Ubiquitous data

Ubiquitous data

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作者： Hotho, Andreas Pedersen, Rasmus Ulslev Wurst, Michael University Kassel Depart. of Electrical Engineering/Computer Science Knowledge and Data Engineering Group Germany Copenhagen Business School Dept. of Informatics Embedded Software Lab. Copenhagen Denmark Technical University Dortmund Computer Science LS8 44221 Dortmund Germany

ISBN: (纸本)3642163912

Ubiquitous knowledge discovery systems must be captured from many different perspectives. In earlier chapters, aspects like machine learning, underlying network technologies etc. were described. An essential component, which we shall discuss now, is still missing: Ubiquitous data. While data themselves are a central part of the knowledge discovery process, in a ubiquitous setting new challenges arise. In this context, the emergence of data itself plays a large role, therefore we label this part of KDubiq systems ubiquitous data. It clarifies the KDubiq challenges related to the multitude of available data and what we must do before we can tap into this rich information source. © 2010 Springer-Verlag.

关键词： Taps

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Towards the use of policy decomposition for composite service management by non-expert end-users

Towards the use of policy decomposition for composite servic...

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IEEE Network Operations and Management Symposium Workshops (NOMS Workshops)

作者： John Keeney David Lewis Vincent Wade Knowledge & Data Engineering Group (KDEG) & FAME School of Computer Science & Statistics Trinity College Dublin Dublin Ireland

ISBN: (纸本)9781424460373;9781424460380

With the advent of Web 2.0, as web service composition gets easier, there is a trend towards nonexpert users not just consuming information and services, but also providing, aggregating, composing and eventually managing their own information, services and resources. However non-expert users need to manage their composed services in a way they can understand. Policy-based management promises the ability to control services in a consistent manner via high-level declarative directives, constraints and goals. However, a significant drawback of policy-based management for complex systems remains the lack of an automated mechanism to resolve the meaning of high-level goals so they can be enforced [1,2]. We propose an approach to compose the available heterogeneous management interfaces of underlying constituent services to produce a coherent higher-level management interface for the composite service. This composed management interface can then be presented to the user at a level of abstraction that corresponds to non-expert user's needs thereby allowing the user to express their specific requirements. Hence the user can manage their composite service, in a manner tailored to them, without the burden of needing to understand how to manage each constituent service. This supports lower-cost user-initiated management, without access to IT experts, thereby increasing productivity and lowering operating costs.

关键词： knowledge management Resource management engineering management data engineering Computer science Statistics Educational institutions Web services Information management Automatic control

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A dependency modeling approach for the management of ontology based integration systems

A dependency modeling approach for the management of ontolog...

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IEEE Symposium on Network Operations and Management

作者： Aidan Boran Declan O'Sullivan Vincent Wade Bell Labs Ireland Alcatel-Lucent Dublin Ireland Knowledge and Data Engineering Group Trinity College Dublin Dublin Ireland

ISBN: (纸本)9781424453665

Ontology-based information integration systems have been proposed to solve the problem of combining data residing at autonomous and heterogeneous sources. For such ontology based solutions to succeed in an industrial context, the ontologies and mappings need to be managed to allow them to evolve as the data sources evolve. This paper describes a dependency modeling approach to the management of mappings in the integration system. A dependency model and tool have been prototyped within the context of a challenging logistics based industrial systems integration problem.

关键词： Ontologies databases Context modeling Scalability data engineering Educational institutions Prototypes Reverse logistics Supply chains

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A trust model for capability delegation in federated policy systems

A trust model for capability delegation in federated policy ...

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International Conference on Network and Service Management

作者： Kevin Feeney Rob Brennan Simon N. Foley FAME and Knowledge & Data Engineering Group Trinity College Dublin Ireland FAME and Department of Computer Science University College Cork Ireland

Federated policy systems are required to support the complexity and organizational heterogeneity of the modern marketplace. The Community-based Policy Management System (CBPMS) is such a distributed policy management approach. It utilizes a tree-based capability authority model to partition and delegate federated capabilities. However CBPMS delegation chains have limitations such as: performance overheads due to distributed rule evaluation, threats from malformed or malicious federated principals and a lack of flexibility with respect to delegation chain reduction or capability authority re-partitioning. In this paper we introduce a trust management model for CBPMS that addresses all of these issues.. A brief security analysis is presented and a telecommunications service management use case described.

关键词： Conferences Authorization Organizations Public key Telecommunications

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Evaluation of ontology mapping representations

Evaluation of ontology mapping representations

引用

23rd Convention of the Society for the Study of Artificial Intelligence and Simulation of Behaviour, AISB 2009

作者： Thomas, Hendrik O'Sullivan, Declan Brennan, Rob Knowledge and Data Engineering Group School of Computer Science and Statistics Trinity College Dublin Ireland

ISBN: (纸本)1902956850

A common approach to mitigate the effects of ontology heterogeneity is to discover and express the specific correspondences between different ontologies. An open research question is: how should such ontology mappings be represented. In recent years several proposals for an ontology mapping representation have been published, but till today no format is officially standardized or generally accepted in the community. In this paper we will present a new evaluation framework for ontology mapping representations for a pragmatic state of the art overview of their characteristics. In particular we are interested how current ontology mapping representations can support the management of ontology mappings (sharing, re-use, alteration) as well as how suitable they are for different mapping tasks.

关键词： Ontology

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Non-invasive adaptation service for web-based content management systems

Non-invasive adaptation service for web-based content manage...

引用

1st International Workshop on Dynamic and Adaptive Hypertext: Generic Frameworks, Approaches and Techniques, DAH 2009

作者： Koidl, Kevin Conlan, Owen Wade, Vincent Centre for Next Generation Localisation Knowledge and Data Engineering Group Trinity College Dublin Ireland

Most Adaptive Hypermedia Systems today focus on providing an adaptive portal or presentation/application through which adaptive retrieved content is delivered. Moreover the content used by such adaptive systems tends to be handcrafted for adaptivity, i.e. from closed corpus repositories. If adaptive hypermedia is to become more mainstream we need the ability to embed adaptive information retrieval and composition techniques within existing Web-based Content Management Systems (WCMS) e.g. Wiki, Drupal. However the effort and expense in fundamentally re-engineering such WCMS or developing completely new adaptive WCMS, is very high. This research explores the architectural and technical issues involved in providing a third party adaptive service which is more easily plugged into existing WCMS. The advantage of this approach is that it doesn't break the current browsing paradigm of freely navigating across different independent web sites on the web. In order to address this challenge we introduce a third party Adaptive Service that enables a unified cross-website personalized experience by discretely interfacing with separate independent WCMS. Thus the Adaptive Service strives to personalize the users experience when accessing each WCMS in a non-invasive manner by not adversely interfering with the web sites overall look and feel, content and functionality without losing the web sites identity and fundamental experience. This paper describes the design and an initial use case supported implementation example of this Adaptive Service. It also provides a survey that assesses the feasibility of the services integration with leading WCMS.

关键词： Websites

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